[PATCH] Fix unresponsive SDL GUI by handling SDL_QUIT events

[Ahmad Fatoum]

Hi,

alternative title suggestion:

sandbox: sdl: fix unresponsive GUI by handling SDL_QUIT events

You can check git log for individual files to see the style of commit
message titles. No need to resend for just that though, I think.

On 27.10.24 09:17, alaanourali at gmail.com wrote:
> From: Alaa Ali <alaanourali at gmail.com>
> 
> The SDL GUI in the scanout function can appear unresponsive to the
> operating system, as it lacks an event handler. This patch adds a
> new function, handle_sdl_events(), which processes SDL events to
> ensure the window can respond to close requests.
> 
> This addresses issues where Linux might think the SDL window is
> unresponsive, allowing it to handle SDL_QUIT events properly and
> initiate shutdown.
> 
> Signed-off-by: Alaa Ali <alaanourali at gmail.com>

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

Cheers,
Ahmad

> ---
>  arch/sandbox/os/sdl.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/sandbox/os/sdl.c b/arch/sandbox/os/sdl.c
> index 13178abfc0..0fc281b7b8 100644
> --- a/arch/sandbox/os/sdl.c
> +++ b/arch/sandbox/os/sdl.c
> @@ -13,6 +13,15 @@ static void sdl_perror(const char *what)
>  	printf("SDL: Could not %s: %s.\n", what, SDL_GetError());
>  }
>  
> +static void handle_sdl_events(void)
> +{
> +    SDL_Event event;
> +    while (SDL_PollEvent(&event)) {
> +        if (event.type == SDL_QUIT)
> +        	SDL_AtomicSet(&shutdown, true);
> +    }
> +}
> +
>  static struct sdl_fb_info info;
>  static SDL_atomic_t shutdown;
>  SDL_Window *window;
> @@ -47,6 +56,7 @@ static int scanout(void *ptr)
>  	while (!SDL_AtomicGet(&shutdown)) {
>  		SDL_Delay(100);
>  
> +		handle_sdl_events();  /* Handle events like window close */
>  		SDL_UpdateTexture(texture, NULL, buf, surface->pitch);
>  		SDL_RenderClear(renderer);
>  		SDL_RenderCopy(renderer, texture, NULL, NULL);


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